Changes to Create plan group

added the new optional request property ordered_add_ons/items/credits

added the new optional request property ordered_plans/items/credits

added the optional property data/ordered_add_on_ids/items/credits to the response with the 201 status

added the optional property data/plan_ids/items/credits to the response with the 201 status

added the new required request property show_estimated_total

added the required property data/component_settings/show_estimated_total to the response with the 201 status

added the new optional request property trial_eligibility_per_plan

added the required property data/trial_eligibility_per_plan to the response with the 201 status

the request property checkout_bundle_purchase_behavior became optional

added the new required request property checkout_bundle_purchase_behavior

added the required property data/checkout_settings/bundle_purchase_behavior to the response with the 201 status

added the new required request property checkout_collect_tax_id

added the required property data/checkout_settings/collect_tax_id to the response with the 201 status

added the new required request property opt_in_enabled

added the new optional request property opt_in_text

added the new optional request property opt_in_title

added the optional property data/checkout_settings/opt_in_text to the response with the 201 status

added the optional property data/checkout_settings/opt_in_title to the response with the 201 status

added the required property data/checkout_settings/opt_in_enabled to the response with the 201 status

added the new optional request property custom_checkout_fields